chore: update OpenAPI spec from monorepo (#395)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

.speakeasy/in.openapi.yaml

@@ -23896,7 +23896,9 @@ paths:
       x-speakeasy-name-override: createSpeech
   /audio/transcriptions:
     post:
-      description: Transcribes audio into text. Accepts base64-encoded audio input and returns the transcribed text.
+      description: >-
+        Transcribes audio into text. Accepts base64-encoded audio input as JSON or an OpenAI-style multipart/form-data
+        file upload, and returns the transcribed text.
       operationId: createAudioTranscriptions
       requestBody:
         content:
@@ -23909,6 +23911,37 @@ paths:
               model: openai/whisper-large-v3
             schema:
               $ref: '#/components/schemas/STTRequest'
+          multipart/form-data:
+            example:
+              file: audio.wav
+              language: en
+              model: openai/whisper-large-v3
+            schema:
+              properties:
+                file:
+                  description: >-
+                    The audio file to transcribe. The format is derived from the filename extension or the file part
+                    content type. Max 25 MB; send larger files as base64 JSON via input_audio.
+                  format: binary
+                  type: string
+                language:
+                  description: The language of the input audio (ISO-639-1).
+                  type: string
+                model:
+                  description: The model to use for transcription.
+                  type: string
+                response_format:
+                  description: The response format. Only "json" is supported.
+                  enum:
+                    - json
+                  type: string
+                temperature:
+                  description: The sampling temperature.
+                  type: number
+              required:
+                - file
+                - model
+              type: object
         required: true
       responses:
         '200':